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Cyclodextrin derivatives in GC separation of racemic mixtures of volatiles. Part IX. The influence of the different polysiloxanes as diluting phase for 2,3-di-O-acetyl-6-O-t-butyldimethylsilyl-β-cyclodextrin on the separation of some racemates

✍ Scribed by C. Bicchi; A. D'Amato; V. Manzin; A. Galli; M. Galli

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
665 KB
Volume
7
Category
Article
ISSN
1040-7685

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✦ Synopsis

Abstract

The results of a series of experiments concerning the GC enantioseparation of some racemates on columns coated with 2,3‐di‐O‐acetyl‐6‐O‐t‐butyldimethylsilyl‐β‐cyclodextrin diluted in two different polysiloxanes (PS‐086 and OV‐1701) are reported. The investigation is centered on the influence of the diluting phase on the separations of the racemates investigated [δ‐heptalactone, linalyl acetate, and an homologous series of cis‐2‐(2‐alkyl‐cyclopropyl)‐ethanol (alkyl from ethyl to heptyl)] because one of the two polysiloxanes separated them, whereas the other did not. Column retention and efficiency characteristics were investigated as a function of the diluting phase. Retention increase (RI) and Gibbs–Helmholtz parameter (Δ~R,S~ΔG) were determined for each of the above racemates, analyzed by different mixtures of the CDD selector with the two diluting phases. © 1995 John Wiley & Sons, Inc.

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